How to put the first line of text file in the end position

I have a streamwriter. I wrote into a text file all lines but I want to put the first line in the last position of the text file. After writing the stream, i want to switch first line to the last but the first line should not be left blank but to shift the preceeding lines up and then write the stream again. How can i Hold the first line in a variable and start writing from second line and in which part of the code. Thanks in Advance

using (System.IO.StreamWriter file = new System.IO.StreamWriter(filepath))
{
string[] buffer = new string[count];
while (!(lines = reader.ReadLine()).Contains("Records"))
{
for (int i = 0; i < count - 1; i++)
{
string[] fields = lines.Split('|');
Result[i, 0] = "";
Result[i, 1] = fields[1];
Result[i, 2] = " ";
Result[i, 3] = xx;
Result[i, 4] = "";
Result[i, 5] = fields[4];
Result[i, 6] = "";
Result[i, 7] = fields[0];
Result[i, 8] = "";
if (fields[15].Contains("PASS"))
{
Result[i, 9] = "P";
}
else if (fields[15].Contains("FAIL"))
{
Result[i, 9] = "F";
}
Result[i, 10] = "";
Result[i, 11] = "";
Result[i, 12] = "";
Result[i, 13] = "";
Result[i, 14] = "";
}
}
else if (fields.Length == 7)
{
Result[i, 1] = "";
Result[i, 2] = "";
Result[i, 3] = fields[0]; //Test Code
Result[i, 4] = "1"; // Test Channel
Result[i, 5] =fields [4]; // Test Value
Result[i, 6] = "0"; //Test Frequency
if (fields[5].Contains("PASS"))
{
Result[i, 7] = "P";
}
else if (fields[5].Contains("FAIL"))
{
Result[i, 7] = "F";
}
Result[i, 8] = "0"; // Test Volt
Result[i, 9] = fields[1];
Result[i, 10] = "0.0";
}
}
Result[i, 11] = "0";
Result[i, 12] = "1";
Result[i, 13] = "1";
Result[i, 14] = "0";
Result[i, 15] = Profile_Index.ToString();
}
result = ("PATS_TEST" + "," + Result[i, 1] + "," + Result[i, 2] + "," + Result[i, 3] + "," + Result[i, 4] + "," + Result[i, 5] + "," + Result[i, 6] + "," + Result[i, 7] + "," + Result[i, 8] + "," + Result[i, 9] + "," + Result[i, 10] + "," + Result[i, 11] + "," + Result[i, 12] + "," + Result[i, 13] + "," + Result[i, 14] + "," + Result[i, 15]);
if (fields[0].Contains("END-OF-LINE"))
{
result = ("END-OF-LINE");
}
}
Profile_Index++;
// Console.WriteLine(result);
file.WriteLine(result);
}

Hello Hesham,

You can try this.

//---------------------------------------------------------------------------------------------------

private void button3_Click(object sender, EventArgs e)

{

string line = null;

string FirstLineContent = "";

int line_number = 0;

int line_to_delete = 1;

string tempFile = Path.GetTempFileName();

using (StreamReader reader = new StreamReader(@"D:\Sample.txt"))

{

using (StreamWriter writer = new StreamWriter(tempFile))

{

while ((line = reader.ReadLine()) != null)

{

line_number++;

if (line_number == line_to_delete)

{

FirstLineContent = line;

}

else

{

writer.WriteLine(line);

}

writer.WriteLine(FirstLineContent);

}

File.Delete(@"D:\Sample.txt");

File.Move(tempFile, @"D:\Sample.txt");

}

//---------------------------------------------------------------------------------------------------

-- Nirav Daraniya

-- Www.codeoverflow.net

2 Replies

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Nirav Daraniya10y ago
Accepted answer
Hello Hesham,
You can try this.
//---------------------------------------------------------------------------------------------------
private void button3_Click(object sender, EventArgs e)
{
string line = null;
string FirstLineContent = "";
int line_number = 0;
int line_to_delete = 1;
string tempFile = Path.GetTempFileName();
using (StreamReader reader = new StreamReader(@"D:\Sample.txt"))
{
using (StreamWriter writer = new StreamWriter(tempFile))
{
while ((line = reader.ReadLine()) != null)
{
line_number++;
if (line_number == line_to_delete)
{
FirstLineContent = line;
}
else
{
writer.WriteLine(line);
}
}
writer.WriteLine(FirstLineContent);
}
}
File.Delete(@"D:\Sample.txt");
File.Move(tempFile, @"D:\Sample.txt");
}

//---------------------------------------------------------------------------------------------------

-- Nirav Daraniya
-- Www.codeoverflow.net
0
Tapan Patel10y ago
It would be great if you can show some sample data to understand the issue. I just tried your code and it seems that it is partial. If you can show some sample data, we may be able to help with effective solution.
0